2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/219740This paper reports preliminary results of a study of the HA production process in e+e- collisions at a 1 TeV linear collider and their implication in the study of dark matter at particle colliders. The analysis is carried out using full Geant-4 simulation and reconstruction for the LDC detector model.5 pages, 3 figures, to appear in the proceedings of the 2007 International Linear Collider Workshop, LCWS07, DESY, Hamburg, Germany, May30 - June 3, 2007High Energy Physics - Phenomenologytext